Attachment 95839 Details for Bug 73539 – Workaround: Unconditionally activate all lanes on eDP port

Workaround: Unconditionally activate all lanes on eDP port

0001-workaround-to-get-link-training-to-succeed-on-Dell-V.patch (text/plain), 1.10 KB, created by Markus Blank-Burian on 2014-03-15 01:23:08 UTC

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Creator: Markus Blank-Burian

Created: 2014-03-15 01:23:08 UTC

Size: 1.10 KB

patch

obsolete

>From 9afd4116e93c1d038785c8cfea2938be96ae3740 Mon Sep 17 00:00:00 2001
>From: Markus Blank-Burian <burian@muenster.de>
>Date: Sat, 15 Mar 2014 03:12:36 +0100
>Subject: [PATCH] workaround to get link training to succeed on Dell Venue 7130
> activate all four lanes unconditionally
>
>---
> drivers/gpu/drm/i915/intel_dp.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
>diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
>index bb66f93..44c00c2 100644
>--- a/drivers/gpu/drm/i915/intel_dp.c
>+++ b/drivers/gpu/drm/i915/intel_dp.c
>@@ -916,8 +916,8 @@ intel_dp_compute_config(struct intel_encoder *encoder,
> 		mode_rate = intel_dp_link_required(adjusted_mode->crtc_clock,
> 						   bpp);
> 
>-		for (lane_count = 1; lane_count <= max_lane_count; lane_count <<= 1) {
>-			for (clock = 0; clock <= max_clock; clock++) {
>+		for (clock = 0; clock <= max_clock; clock++) {
>+			for (lane_count = max_lane_count; lane_count <= max_lane_count; lane_count <<= 1) {
> 				link_clock = drm_dp_bw_code_to_link_rate(bws[clock]);
> 				link_avail = intel_dp_max_data_rate(link_clock,
> 								    lane_count);
>-- 
>1.9.0
>

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Attachments on bug 73539: 91929 | 91941 | 93199 | 93200 | 93527 | 93528 | 94727 | 95839 | 97772 | 97773

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